EP0643250B1 - Assemblage de tuyaux à paroi double - Google Patents

Assemblage de tuyaux à paroi double Download PDF

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Publication number
EP0643250B1
EP0643250B1 EP94113759A EP94113759A EP0643250B1 EP 0643250 B1 EP0643250 B1 EP 0643250B1 EP 94113759 A EP94113759 A EP 94113759A EP 94113759 A EP94113759 A EP 94113759A EP 0643250 B1 EP0643250 B1 EP 0643250B1
Authority
EP
European Patent Office
Prior art keywords
pipe
piping system
double
supporting elements
walled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94113759A
Other languages
German (de)
English (en)
Other versions
EP0643250A1 (fr
Inventor
Wendelin Wanner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Braas GmbH
Original Assignee
Braas GmbH
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Filing date
Publication date
Application filed by Braas GmbH filed Critical Braas GmbH
Publication of EP0643250A1 publication Critical patent/EP0643250A1/fr
Application granted granted Critical
Publication of EP0643250B1 publication Critical patent/EP0643250B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J13/00—Fittings for chimneys or flues 
    • F23J13/02—Linings; Jackets; Casings
    • F23J13/025—Linings; Jackets; Casings composed of concentric elements, e.g. double walled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L39/00—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
    • F16L39/005—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies for concentric pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2211/00—Flue gas duct systems
    • F23J2211/10—Balanced flues (combining air supply and flue gas exhaust)
    • F23J2211/101—Balanced flues (combining air supply and flue gas exhaust) with coaxial duct arrangement

Definitions

  • the invention relates to a double-walled piping system, in particular for an air-exhaust-chimney, with an inner pipe system which is arranged concentrically in an outer pipe system by means of spacers, the inner pipe system having inner pipe parts which can be displaced longitudinally and the outer pipe system has individual outer pipes with a shoulder-shaped section with a surface running diagonally or transversely to the axis of the piping system.
  • EP 0 399 123 A1 discloses a spacer for the formation of double-walled tubes, which is clamped onto a straight tube section serving as an inner tube and, with its webs facing outward, creates a concentric distance to a straight tube section serving as an outer tube .
  • EP 0 399 123 A1 only straight double-walled pipe sections can be produced.
  • the spacer permits strong displacements in the axial direction from an inner tube relative to an outer tube.
  • a double-walled pipe system is known, formed from pipes arranged concentrically to one another, which are connected to one another with adhesive sleeves or adhesive sleeves, in which between the inner pipe and the outer pipe rigid, perforated centering rings are used with adhesive or adhesive.
  • the arrangement known from DE 39 26 202 A1 represents a double-walled piping system which is rigid due to the connection technology used for adhesive or adhesive bonding. Tensions can arise between the inner pipe and the outer pipe with different thermal expansion, which can lead to destruction within individual pipe sections. Subsequent changes to a fully installed pipeline of this type are only possible by cutting the pipeline.
  • DE 42 01 703 A1 describes a construction system for creating double-walled chimneys as well as exhaust and exhaust steam lines, in which the inner pipe system is made of plastic and the outer pipe system is made of stainless steel.
  • the entire inner pipe system is attached to a base element together with the outer pipe system.
  • Connecting sleeves for the inner tubes, which are manufactured as injection-molded plastic parts, have longitudinal ribs which only have a centering effect. The entire change in length of the inner pipe system due to temperature changes must be compensated for at the mouth of the chimney.
  • a connection for a double-walled piping system is known from US-A-4,029,343.
  • the piping system has an inner pipe system which is constructed from individual inner pipes and a connecting pipe.
  • the inner tubes are provided with radially projecting flanges at the ends.
  • One of the inner tubes is connected at the end to the connecting tube. Since the outer diameter of the connecting tube is smaller than the inner diameter of an inner tube, the connecting tube can be inserted longitudinally displaceably into another inner tube. In this way, a thermal elongation of the inner pipe system can be compensated and a length adjustment during assembly is possible.
  • the inner pipe system is radial acting spacers arranged concentrically in an outer pipe system.
  • the outer pipe system is assembled from individual outer pipes, each outer pipe having at least one shoulder-shaped section with a surface running obliquely or transversely to the axis of the pipe system.
  • the invention has for its object to provide a double-walled, mechanically stress-free piping system for large heights with the smallest possible number of different components, the assembly and subsequent changes can be carried out by hand without the use of tools and the application of Joining techniques such as gluing or welding are no longer necessary.
  • the object is achieved in that the inner tube system has individual first inner tubes and second inner tubes inserted in tube connectors, that the spacers are designed as supporting elements on the shoulder-shaped sections in the axial direction, supporting elements, that in each case the second inner tube inserted into a tube connector from above is supported on this pipe connector and that the length of a first inner tube inserted into a tube connector from below is reduced by the amount of the greatest possible elongation to be expected, so that each inner tube is supported individually.
  • each individual inner pipe is centered in the radial direction by the support elements and is also supported separately in the axial direction.
  • the assembly of the piping system and the production of the individual pipes is particularly simple if the support elements are arranged in the area of a connection between two outer pipes of the outer pipe system.
  • the cross-sectional area of the annular gap between the inner and outer tubes is only insignificantly reduced if the support elements are designed as webs distributed over the circumference.
  • the support elements can be connected to one another and rest on the outside on a shoulder-shaped section of an outer pipe and if surfaces are arranged on an inner pipe that are oblique or transverse to the axis and on which the inner pipe rests on the support elements .
  • three or more support elements can be arranged on a ring which is inserted into an outer tube before an inner tube is inserted.
  • the support elements can also be provided on the outer surface of a clamp spanning an inner tube and pointing outwards.
  • a particularly stable design of the support elements is possible if they are made in one piece with a pipe connector of the inner pipe system. It is possible to produce such an inner tube part with an outer shape that is longitudinally divided in the middle if four support elements are formed in 90 ° division over the circumference of the inner tube part.
  • a tube connector is provided for connecting the inner tubes, which is designed like a sleeve in the region of both end sections and has a projection on its inner wall.
  • the pipe connector is supported on an outer pipe via the support elements.
  • the inner tube inserted into the tube connector from above is supported on the projection.
  • the support elements are advantageously arranged on an end section of a pipe connector or an inner pipe bend into which another inner pipe can be inserted.
  • This end section is preferably sleeve-like with an inner diameter corresponding to the outer diameter of an inner tube.
  • the inner tube in question can be straight, as a pipe bend in various angles, as a T-piece, as a branch, as a revision part, as a valve or as a flap.
  • An inner tube inserted between two tube connectors is shorter than the axial distance of the projections provided in the two tube connectors in the cold state in accordance with the expected elongation.
  • the inner tube inserted into the pipe connector from below only extends to the protrusion due to the elongation under extreme temperature loads and can retract accordingly in the axial direction when shortened due to cooling. Therefore, the inner pipe system is free from axial forces due to thermal expansion, because each inner pipe is supported individually. This also has the advantage that in the case of a vertical installation situation, the entire weight of the inner pipe system does not bear on the lowest inner pipe.
  • a particularly short version of the pipe connector is possible if the two sleeve-like end sections only through a narrow projection on its inner wall are separated approximately in the longitudinal center.
  • a gas-tight design of the inner pipe system is achieved if a circumferential bead, into which a sealing ring is inserted, is attached near the free end of an end section of a pipe connector or an inner pipe bend.
  • the support elements can be made particularly short if they are arranged in the region of a bead.
  • the support elements in the socket area of a pipe connector are advantageously molded onto the outside of a bead, distributed uniformly over its circumference.
  • the side view of the support elements can be substantially trapezoidal, the length in the axial direction corresponding to approximately twice the width of the bead and the thickness approximately to the wall thickness of the pipe connector.
  • the outer pipe system can be composed of outer pipes, which are widened in a sleeve-like manner at one end to a shoulder-shaped section against which the support elements bear.
  • outer pipes which are widened in a sleeve-like manner at one end to a shoulder-shaped section against which the support elements bear.
  • drain pipes or the like with a socket connection for the outer pipe system.
  • These can consist of plastic, metal, ceramic, glass or the like.
  • the outside of the support element can be chamfered in the area of the contact surface. If the outside of the support element is step-shaped with a nose protruding towards the contact surface, the insertion end of an outer tube can be pushed very far into the socket connection.
  • the insertion of the insertion end is facilitated if a connection chamfer is provided on the upper edge of a support element.
  • the end of the insertion end of the outer tube lies on the lugs of the support elements.
  • a larger contact surface for the end face of an insertion end and for the support elements on the outer tube is achieved if the support elements are connected to a ring which rests on the shoulder-shaped section of the outer tube.
  • double-walled pipe parts are created which, combined with straight inner pipe sections and straight outer pipe sections each with the required lengths, form a double-walled pipe system.
  • Plastic, metal, glass and ceramic and a combination thereof are suitable as materials for piping systems produced using pipe connectors according to the invention.
  • the outer and inner pipes can consist of hard polyvinyl chloride (PVC-U) or polypropylene (PP).
  • PVC-U hard polyvinyl chloride
  • PP polypropylene
  • these and the tube connectors can be made, for example, of polytetrafluoroethylene (PTFE), polyetherimide (PEI) or polyvinylidene fluoride (PVDF).
  • connection points of the inner pipe system and the outer pipe system which are plugged together are sealed by means of sealing rings known per se with appropriate temperature resistance.
  • the support elements on the inner tube can also be made in one piece with an outer tube, pointing inwards, surfaces on the inner tube part resting on the support elements being arranged obliquely or transversely to the axis.
  • FIG. 1 shows a double-walled piping system 10 with an inner pipe system 12 made of PEI and an outer pipe system 14 made of PVC-U arranged concentrically to it.
  • the inner tube system 12 is composed of straight inner tubes 18, 20 with a round cross-section and a nominal diameter of 70 mm connected to a tube connector 16 of 102 mm length and 75 mm inner diameter, of which a first inner tube 18 and a second inner tube 20 are shown in FIG. 1 is.
  • the pipe connector 16 is designed in the area of both end sections like a sleeve with an inside diameter corresponding to the outside diameter of the inside pipes 18, 20.
  • On the inner wall of the pipe connector 16 is an annular 1.5 mm long and 2.5 mm projecting inwards in the longitudinal center Projection 22 is arranged on which the second inner tube 20 is supported.
  • the pipe connector 16 has a 9 mm long and 4 mm deep circumferential first bead 24 and a second bead 26, in each of which a sealing ring 28 or 30 is inserted.
  • the outer pipe system 14 is composed of outer pipes 32, 34 with a round cross-section and 100 mm nominal diameter according to DIN 19534, of which a first outer pipe 32 is shown at the bottom in FIG. 1 and an insertion end of a second outer pipe 34 is shown at the top.
  • the end region 36 of the first outer tube 32 shown in FIG. 1 is then widened like a sleeve to a conical shoulder-shaped section 38 and receives the second outer tube 34.
  • the length of a support element 44 in the axial direction is 22 mm and is approximately equal to twice the width of the first bead 24.
  • the thickness of a support element 44 is 2 mm and is equal to the wall thickness of the pipe connector 16.
  • the width of a support element 44 in a section 46 near the end is equal to the difference between the outer radius of the pipe connector 16 and the inner radius of the end region 36 of the first outer tube 32. Otherwise, the width of a support element 44 is equal to the difference between the outer radius of the pipe connector 16 and the inner radius of the second outer tube 34.
  • the portion 46 near the end forms a step on which the second outer tube 34 is seated.
  • the near end Section 46 is drawn in obliquely towards its free end and lies against the inner wall of the shoulder-shaped section 38 of the first outer tube 32, so that it is supported thereon.
  • connection chamfer 48 which facilitates the insertion of the second outer tube 34.
  • FIG. 2 shows a double-walled 87 ° pipe bend with an inner pipe bend 50 and an outer pipe bend 52.
  • the inner pipe bend 50 has a vertical end section 54 pointing upwards in the figure and an angled end section 56 shown horizontally.
  • the vertical end section 54 of the inner tube bend 50 corresponds to an inner tube.
  • a pipe connector 16 is placed on the vertical end section 54 and a second inner pipe 20 is inserted therein.
  • the angled end section 56 of the inner pipe bend 50 is then designed like a pipe connector 16 with a conical extension 58 like a pipe connector with an inner diameter of 75 mm corresponding to the outer diameter of an inner pipe 18.
  • inner ear bend bead 60 Near the free end of the angled end section 56 there is an inner ear bend bead 60 corresponding to the first bead 24 of a pipe connector 16.
  • inner pipe bend support elements 62 corresponding to the support elements 44 and extending in the radial direction and distributed around the circumference are equally spaced at 90 ° molded.
  • the vertical end section 64 of the outer pipe bend 52 like the end region 36 of a first outer pipe 32 described above, is designed like a sleeve.
  • a second outer tube 34 with its Inserted end inserted.
  • the outer pipe bend 52 is designed as a plug-in end corresponding to a second outer pipe 34.
  • the horizontally angled end 66 is inserted into a first outer tube 32 shown here almost horizontally.

Claims (12)

  1. Système de tuyauterie à double paroi (10), en particulier pour une cheminée d'aération et d'échappement de gaz, avec un système de tuyaux intérieurs (12) étant disposé de façon concentrique à l'aide d'écarteurs dans un système de tuyaux extérieurs (14), le système de tuyaux intérieurs (12) présentant des parties de tuyau intérieur emboîtées les unes dans les autres et le système de tuyaux extérieurs (14) présentant des tuyaux extérieurs séparés (32) avec une portion faisant épaulement (38) ayant des surfaces s'étendant en biais ou en travers par rapport à l'axe du système de tuyauterie (10),
    caractérisé en ce que
    le système de tuyaux intérieurs (12) présente des premiers tuyaux intérieurs (18) et des seconds tuyaux intérieurs (20),
    en ce que les écarteurs ont la forme d'éléments-supports (44) soutenant les raccords de tuyaux (16) sur les portions faisant épaulement (38) dans le sens de l'axe,
    en ce que respectivement le second tuyau intérieur (20) emboîté du haut dans un raccord de tuyau est appuyé sur ce raccord de tuyau (16) et en ce que la longueur d'un premier tuyau intérieur (18) emboîté du bas dans un raccord de tuyau (16) est diminué de l'allongement le plus grand possible auquel on puisse s'attendre si bien que chaque tuyau intérieur est soutenu respectivement séparément.
  2. Système de tuyauterie à double paroi selon la revendication 1,
    caractérisé en ce que
    les éléments-supports (44, 62) sont disposés dans la zone de raccord de deux tuyaux extérieurs (32, 34; 52, 34 et resp. 32, 52) du système de tuyaux extérieurs (14).
  3. Système de tuyauterie à double paroi selon la revendication 1 ou 2,
    caractérisé en ce que
    les éléments-supports (44, 62) ont la forme d'entretoises réparties sur la circonférence.
  4. Système de tuyauterie à double paroi selon l'une des revendications 1 à 3,
    caractérisé en ce que
    les éléments-supports (44, 62) sont reliés les uns aux autres et reposent à l'extérieur sur une portion (38) faisant épaulement d'un tuyau extérieur (32) et que des surfaces s'étendant en biais ou en travers par rapport à l'axe sont disposées sur un tuyau intérieur, sur lesquelles le tuyau intérieur repose sur les éléments-supports (44, 62).
  5. Système de tuyauterie à double paroi selon l'une des revendications 1 à 3,
    caractérisé en ce que
    les éléments-supports (44) sont réalisés d'une pièce avec un raccord de tuyau (16).
  6. Système de tuyauterie à double paroi selon la revendication 5,
    caractérisé en ce que
    le raccord de tuyau (16) a la forme d'un mouffon dans la zone des portions finales et présente une avancée (22) sur sa paroi interne.
  7. Système de tuyauterie à double paroi selon l'une des revendications 1 à 3,
    caractérisé e n ce que
    les éléments-supports (44, 62) sont disposés à la portion finale d'un raccord de tuyau (16) et donc d'une courbure de tuyau intérieur (50) dans lequel un autre tuyau intérieur (18, 20) peut s'emboîter.
  8. Système de tuyauterie à double paroi selon la revendication 6 ou 7,
    caractérisé en ce que
    près de l'extrémité libre de la portion finale d'un raccord de tuyau (16) et donc d'une courbure de tuyau intérieur (50) est disposée une moulure (24, 26, 60) dans laquelle un anneau d'étanchéité (28, 30) est déposé.
  9. Système de tuyauterie à double paroi selon la revendication 8,
    caractérisé en ce que
    les éléments-supports (44, 62) sont disposés dans la zone de la moulure (24, 25, 60).
  10. Système de tuyauterie à double paroi selon l'une des revendications 1 à 9,
    caractérisé en ce que
    le système de tuyaux extérieurs (14) est constitué de tuyaux extérieurs (32, 34, 52) étant élargis en forme de manchon à une extrémité adjacente à une portion (38) formant épaulement sur laquelle les éléments-supports portent (44, 62).
  11. Système de tuyauterie à double paroi selon la revendication 10,
    caractérisé en ce que
    les éléments-supports sont reliés par un anneau portant sur la portion formant épaulement (38).
  12. Système de tuyauterie à double paroi selon l'une des revendications 1 à 3,
    caractérisé en ce que
    les éléments-supports sont réalisés en une pièce et tournés vers l'intérieur et que des surfaces s'étendant en biais ou en travers par rapport à l'axe sont disposées sur une partie de tuyau intérieur reposant sur les éléments-supports.
EP94113759A 1993-09-14 1994-09-02 Assemblage de tuyaux à paroi double Expired - Lifetime EP0643250B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4331194 1993-09-14
DE4331194A DE4331194C1 (de) 1993-09-14 1993-09-14 Doppelwandiges Rohrleitungssystem

Publications (2)

Publication Number Publication Date
EP0643250A1 EP0643250A1 (fr) 1995-03-15
EP0643250B1 true EP0643250B1 (fr) 1997-04-16

Family

ID=6497697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94113759A Expired - Lifetime EP0643250B1 (fr) 1993-09-14 1994-09-02 Assemblage de tuyaux à paroi double

Country Status (4)

Country Link
EP (1) EP0643250B1 (fr)
AT (1) ATE151851T1 (fr)
DE (2) DE4331194C1 (fr)
DK (1) DK0643250T3 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19511021C2 (de) * 1995-03-28 1998-10-01 Centrotherm Abgastechnik Gmbh Rohrstück für eine Luft-Abgas-Führung
FR2803896A1 (fr) * 2000-01-17 2001-07-20 Pomel Ets Conduit, notamment conduit de fumee, avec conduit de ventilation concentrique
DE10159564C1 (de) * 2001-12-05 2003-06-26 Ct Therm Abgassystemtechnik Gm Einrichtung zum Verbinden zweier Abschnitte einer Luft-Abgas-Leitung
EP2023058B1 (fr) * 2007-07-26 2015-09-23 Geberit International AG Elément de raccordement pour un circuit de liquide comportant une conduite de circulation interne d'une installation d'alimentation en eaux usées ou en eau chaude, installation de conduite dotée d'un tel élément de raccord et procédé destiné à monter une telle installation de conduite
EP2060855B1 (fr) * 2007-11-13 2014-07-09 Geberit International AG Conduite de circulation d'eau dotée d'un élément de raccordement et procédé de montage d'une telle conduite de circulation d'eau
DE102008005542A1 (de) * 2008-01-22 2009-07-23 Horst Wunsch Kaminsystem
US9157557B2 (en) 2012-10-31 2015-10-13 Xylem Water Solutions U.S.A., Inc. Gas distribution assembly
CN103727314B (zh) * 2014-01-08 2015-10-28 江苏南通六建建设集团有限公司 无机化学品管道内穿软管施工方法
NL2024894B1 (en) * 2020-02-13 2021-09-15 Ddc Eng B V Hose

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4341392A (en) * 1975-10-03 1982-07-27 Wavin B.V. Plastics pipes having walls with lengthwise extending channels
US4029344A (en) * 1976-09-23 1977-06-14 Wallace-Murray Corporation Connection joint for prefabricated metal chimney
US4029343A (en) 1976-09-23 1977-06-14 Wallace-Murray Corporation Expansion joint for prefabricated double-walled metal chimney
DE3105406A1 (de) * 1981-02-14 1982-09-02 Hergen 3100 Celle Sandl Konische selbstdichtende kernrohrmuffenverbindung und zentriereinrichtung fuer doppelrohre (doppelrohrsysteme)
US4886305A (en) * 1988-08-12 1989-12-12 Fibercast Company Double containment pipe fittings and apparatus to adhesively install the same
US5018260A (en) * 1989-05-26 1991-05-28 Asahi/America, Inc. Supports for double-containment thermoplastic pipe assemblies
DE4201703C2 (de) * 1992-01-23 1994-02-10 Bertrams Ag Bausystem zum Erstellen von doppelwandigen Schornsteinen sowie Abgas- und Abdampfleitungen

Also Published As

Publication number Publication date
DE4331194C1 (de) 1994-10-06
ATE151851T1 (de) 1997-05-15
EP0643250A1 (fr) 1995-03-15
DK0643250T3 (da) 1997-09-15
DE59402433D1 (de) 1997-05-22

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